A new study suggests that later start times can have a dramatic effect on the success of high school students. Reuters reports:

McKeever and colleague Linda Clark looked at school start times, graduation rates and attendance rates for 30,000 students in 29 high schools across seven states. They found that two years after a delayed start was implemented at these high schools, average attendance rates and graduation rates had increased several percentage points.

For example, the average graduation completion rate was 79 percent before the delayed start was implemented, and it was 88 percent afterward.

“This doesn’t only impact our high school students. This impacts all of society,” McKeever said. “As graduation rates improve, young adults experience less hardship after graduation, a lower chance of incarceration and a higher chance of career success.”

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